Warp stop mechanism for looms



Jan. 8, 1924. 1,480,124

E. S STIMPSON WARP STOP MECHANISM FOR LOOMS OriginalFiled Dec. 29. 1921 2 Sheets-Sheet 1 VENTOF?! /WMM ATTORNEY Jan. 8 1924.

E. S. STIMPSON WARP STOP MECHANISM FOR LOOMS 2 Sheets-Sheet 2 Original Filed Dec. 29 1921 ATi-o RNE Y Patent den. 1924.

1 on, or morn-cane, mnssacnns 5 or Hermann, nassacnnsnrs, A oonronn-rron or name.

ASSIGNOR T0 DER COR- WJP S'I'OE MECHAN FOR LOOKS.

Original application filed December 29, 1921, eriai No. 525,705. Divided and this application filed November 10, 1922. Serial No. 599,973. 1

To all whom it may concern:

Be it known that I, EDWARD S. STIMPSON,

a citizen of the United States, residing at Hopedale, in the county. of Worcester and a State of Massachusetts, have invented an Improvement in Warp Stop Mechanisms for Looms, of which the following description,

in connection with the accompanying drawings, is a specification, like characters on no the drawings representing like parts.

The present invention relates to warp stop mechanisms for looms, and the present application is a division of application Serial No. 525,705, filed December 29, 1921.

Warp stop mechanisms as now generally constructed comprise a series of dro wires normally supported by the warp threads during weaving and when one or more of the warp threads break or become too slack at for weaving purposes, the associated drop wire moves from a normal to an abnormal position into the path of means, such as a feeler, to efiect loom stoppage. To guide the drop wires in their movements it is now the usual practice to provide each row of drop wires, of which there may be one or more, with a drop wire guide, usually in the form of a bar passed through slots in the drop wires. The introduction of the guide bar through the slots of the drop wires is a tedious operation and is now generally accomplished by stringing the drop wires one after another on the associated guide bar by hand.

One of the objects of the present invention is to facilitate the introduction of a guide bar to its drop wire guiding position or through the slots or guide openings of the drop wires, and an important feature of the present invention consists of a drop wire aligning device which enables the drop wires of a row to be readily brought into alignment with their guide slots positioned for the passage endwise or the associated drop wire guide. This feature of the invention may be advantageously employed in an form of warp sto mechanism for bringlng the drop wires 0' a row into posilid tion side by side but its utility and advantages are best manifested when the drop wires are provided with elongated openings er slots through which the drop wire guide is to extend.

In accordance with the invention, as shown, the drop wire aligning device is tem ororlly supported by the warp stop mec anism proper or other convenient supportwhen the parts are in the position they occupy 1n the loom, and serves to bring the drop-wires into alignment side by side for the introduction endwise of the drop wire gu des,-which may then be secured to the guide supports. The novel features of the invention and new combination of parts will best be made clear from the' following descr ption and accompanying drawings showing one good practical form of the inventlon.

In the drawings Fig. 1 is a prospective view of portions of a warp stop mechanism secured to the loom 1n the position occupied during weaving, the feeler being omitted for clearness of illustration.

Fig. 2 is a cross sectional view showing the aligning device in the position it occupies for aligning the drop wires.

Fig. 3 is a view similar to that of Fig. 2, but showing the aligning device being applied or renewed.

The general construction of the warp stop mechanism may be of any usual or desired type, but as shown it is substantially like that shown and described in the patent to Edward S. Stimpson No. 1,409,425, March '14, 1922, to which reference may be made for a more full disclosure of one form of warp stop mechanism in connection with which the present invention may be advantageously employed.

The loom frame 1 has connected to each side thereof supports for the warp stop mechanism and, as shown, these comprise brackets 2, one at each side of the loom, having slots 3 to which are adjustabl sea cured the side brackets or supports d, w ich,

"14 and carrying the feeler actuatin in the present instance are adjustably connected to the brackets 2 by bolts 5 and slots 6.

The supports 4, one at each side of the loom, constltute the supporting elements for the drop wire guides and the warp supporting rods or bars 8. The number of drop wire guides and warp supporting rods or bars may be varied to suit conditions of use, but ln'the present instance four of each are shown As described in the application Serial- No. 525,705 of which this is a division, the brackets or supports 4 may be connected by a truss frame comprising the upper and, lower rails 9 and blocks 10, and the ends of the truss frame may be secured to the supports a by bolts 11. The feature of truss frame, however, is not claimedin this application and may or may not be employed in connection with the aligning device, to be described.

The side supports a have means for securing the drop wire guides 7 in place, and as shown, such means may be formed of lugs 12 against which the drop wire guides 7 are secured by the clips 13, while the warp supporting re s or bars 8 have their ends sustained in open bearings carried by the side supports 4:.

The rock shaft 15 supported in bearings arm 16 and the arm 27 and its associated evices for efi'ecting loom stoppage when the feeler is arrested by a drop w1re may all be as more fully described in the application of which this is a division, but as such features do not pertain to the aligning device they are not further shown or described herein.

The drop wires 29 consist of metal pieces which may be stamped out of sheet metal or be otherwise formed and each is provided with a guide slot or opening 30. So far as the broad aspects of the invention are concerned, the drop wires 29 may be of any well known ty e, but as shown, they are of the hair pin form, that is, portions of the drip wires are open slotted to form the legs 32. In some cases drop wires of the hair pin type have a hole for the passa e of a warp thread, but usuall the hair p1n drop wire straddles its threa a and is supported on the thread at the closed portion at the upper end of the legs. Either type may be employed in connection with the present invention.

As will be seen from Fig. 3, the drop wire uides 7 pass through the slots 30 of the drop wires, that is each row of drop wires has passed through it a drop wire guide, and to align the drop wires of a row for the insertion of the drop wire guide, the

. present invention provides a drop wire aligning device which is shown in the present instance as formed by aligning members sin-sonar:

33 extending between the saddles 34%, two of which are s own. The aligning members 33 are constructed and arranged to enter the space between the leg portions 32 of the drop wires, which when supported by the warp threads in the loom, align the dro gvires for the endwise insertion of the gui e are.

Each saddle 34 is constructed and arranged as shown to be hung upon some portion of the main warp stop mechanism when such mechanism is in the position it is to oc cupy in the loom, and for this purpose has a hanger at each end for supporting the aligning device in its drop wire ali ing position. In the present instance the hiringer 36 has a hooked portion 37, Figs. 2 and 3, which may be conveniently hun upon the rock shaft 15 while the hanger 38 as a portion 40 which may be hung upon the truss frame 9, and each of the hangers 36 and 38 is adjustably connected to the associated saddle by a bolt or thumb screw 35 passed through a slot 39 in each hanger and into the end portions of the saddle that the position of the aligning bars may be properly adjusted for engagement with the drop wires.

In the use of the drop wire aligning device, the hangers 36 and 38 carrying the saddles and aligning bars or rods are hung upon portions of the warp stop mechanism robably while it is in operative position in the loom with the warp threads a passing over the warp supports 8. When the drop wires 29 are of the type that are supported by the upper closed end of the open slots forming the legs 32, the drop wires are placed upon the warp threads by inserting the drop wires successively over the warp threads with the lower open or hair pin 1e portion of the drop wires engaged with t e associated aligning bar, as indicate in Fig. 2. The efl'ect of this is that all the drop wires of a row are held in alignment side by side with their slots 30 positioned for the endwise introduction of the associated drop wire guide 7. If it were not for the alignin device, the drop wire, when hung upon t e warp threads, would fall or turn about the warp threads as centers and require to be turned back by hand one by one to allow the insertion of the drop wire guide. This is true whether the drop wires are hung upon the Warp threads, as in the present instance, or have the warp threads passed through eyes formed in the drop wires.

After the drop wire guide 7 has been passed through the guide slots of the aligned drop wires, it is secured to the end supports 4: by the clips 13 or other appropriate means, and the drop wire aligning device may then be detached or remain in place as desired.

me ias It will be apparent that the assembly of the drop wires and drop wire uides 1s greatly facilitated by the drop wire ahgnmg device even when the parts of thewarp stop mechanism are in operatlve position.

The feeler carrier, the feelers 4:7 and other features of the warp stop mechanism not claimed herein are consequently not described as they are or may be the same as in the application of which this is a division.

Claims: a

1. In a warp stop mechanism for looms,

the combination of a series of dro wires, drop wire guides for guidmg' t e drop wires of a row, supports at each slde o the loom forming a permanent part of the stop mechanism and unobstructed for the endwise introduction of the drop wlre guides, and a drop wire aligning device for aligning the drop wlres of a row between the supports in the position relatlve thereto that they occupy during weaving that the a weaving that the drop wire guide may be introduced endwise to its supports and into guiding relation with the aligned drop wires while the latter are retained in weaving position. I

3. In a warp stop mechanism for looms, the combination of a series of drop wires having guide slots, a drop wire guide, brackets secured in position at each side of the loom and having supports for the drop wire guide which are unobstructed for the endwise introduction of the guide, and a device for aligning the drop wires of a row between the brackets in weavin position that the drop wire guide when introduced endwise into its permanent guiding position may be inserted through the guide slots of the aligned drop wires while the latter are retained in weaving position.

4:. In a warp stop mechanism for looms, the combination of a series of drop wires having guide slots, a drop wire guide, brackets at each side of the loom forming a permanentpart of the warp stop mechanism and having unobstructed supports for the endwise introduction of the drop wire guide, and a drop wire aligning device mounted to align the drop wires of a row in weaving position between the brackets with the guide slots of the drop wires in line with the unobstructed supports for the drop wire guide that the latter may be passed endwise to its ermanent support and'through the guides ots of thealigned drop wires while-the latterare retained in this position.

5. In a warp stop mechanism'for looms the combination with drop wires and a drop wire guide, of a drop wire aligning device, comprising an aligning bar for engagement' with the drop wires of a row when the drop wires are supported on the warp threads in'the position they occupy during weaving and for lining-up the drop "wires side by side for insertion of the drop wire guide through the drop wires while theyare held in said weaving position, and brackets for supporting the aligning bar for removal from operative position when the drop wire guide has been engaged with the row of aligned drop wires.

6. In a warp stop mechanism for looms, the combination of brackets supported. at each side of the loom, hangers supported from the brackets, a series of drop wires having guide slots and adapted to be strung upon the warp threads between the brackets, an aligning bar mounted on the hangers for aligning the drop wires of a row, and a drop wire guide adapted to be inserted endwise through the guide slots of the aligned row of drop wires and while the drop wires are held in weaving position.

7. In a warp stop mechanism for looms, the combination of two brackets, one at each side of the loom, a series of dro wires, a drop wire guide for guiding the movements of the drop wires during weaving, a drop wire aligning device constructed and arranged for bringing the drop Wires of a row into alignment side by side between the two brackets and in the position they are to occupy during weaving for the endwise insertion of the drop wire guide into the row of aligned drop wires, and means for supporting the drop wire aligning device in drop wire aligning position.

8. In a warp stop mechanism for looms, drop wire guide supports fixed at each side of the loom and unobstructed for the endwise introduction of a drop wire guide, a drop wire guide adapted to be sustained by said supports in drop wire guiding position, an aligning device for aligning the drop wires of a row for engagement by the drop wire guide as the guide is inserted endwise into the fixed supports at each side of the loom, and means for supporting the drop wire aligning device for removal from drop wire guiding position after the row of aligned drop wires have been engaged by the drop wire guide.

9. In a warp stop motion for looms, the combination of two brackets, one at each side of the loom, a drop wire guide adaptlil neeonee ed to be supported by the breckete in drop to permit the dire wire guide to be inserted wire guidingposition, en aligning device through a. row 0 drop wires while the latconstructed and arranged to enga e andi ter are aligned between the brackets in said M9 align a row of dro wires between t e two weaving position.

5 brackets in the posltion they occupy during In testimony whereof, I have signed my weaving, and drop wire guide bearings supname to this specification. pof'ted by the side brackets end constructed EDWARD S. STIMHPSON. 

